Lentin, A.; Schützenberger, M. P. A combinatorial problem in the theory of free monoids. (English) Zbl 0221.20076 Combin. Math. Appl., Proc. Conf. Univ. North Carolina 1967, 128-144 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 44 Documents MSC: 20M05 Free semigroups, generators and relations, word problems Citations:Zbl 0202.285 × Cite Format Result Cite Review PDF